3-quinolyl-substituted dihydropyridines, processes for their preparation and their use in medicaments

ABSTRACT

Intermediate of the formula ##STR1## wherein R 5  represents a cyclic, straight-chain or branched, saturated or unsaturated hydrocarbon radical having up to 12 carbon atoms, which is optionally interrupted up to twice in an identical or different manner by oxygen or sulphur, as intermediates for substituents on novel dihydropyridine cardiovascular compounds.

This is a division of application Ser. No. 08/230,286, filed on Apr. 20, 1994; now U.S. Pat. No. 5,504,210.

The invention relates to new 3-quinolyl-substituted dihydropyridines, processes for their preparation and their use in medicaments, in particular in agents for the treatment of cardiovascular diseases.

It is already known that 1,4-dihydropyridines have vasodilating properties and can be used as coronary agents and antihypertensives. It is furthermore known that 1,4-dihydropyridines cause inhibition of the contractility of smooth and cardiac muscles and can be employed for the treatment of coronary and vascular diseases.

Furthermore, 4-quinolyl-dihydropyridines having a positively inotropic action are already known from U.S. Pat. No. 5,100,900.

The present invention relates to new 3-quinolyl-substituted dihydropyridines of the general formula (I) ##STR2## in which

R¹ and R⁴ are identical or different and represent hydrogen, amino, cyano, formyl or trifluoromethyl, or represent straight-chain or branched alkyl having up to 8 carbon atoms, which is optionally substituted by hydroxyl or by a group of the formula --NR⁶ R⁷, --O--CO--R⁸, --O--(CH₂)_(a) --OR^(8') or --O--(CH₂)_(b) --NR⁹ R¹⁰,

wherein

R⁶, R⁷, R⁹ and R¹⁰ are identical or different and denote hydrogen, phenyl or straight-chain or branched alkyl having up to 6 carbon atoms,

R⁸ and R^(8') are identical or different and denote straight-chain or branched alkyl having up to 6 carbon atoms,

and

a and b are identical or different and denote the number 2, 3, 4 or 5,

R² represents a group of the formula --CO--NR¹¹ R¹² or --CO--A--R¹³,

wherein

R¹¹ and R¹² are identical or different and denote hydrogen or a straight-chain, branched or cyclic, saturated or unsaturated hydrocarbon radical having up to 8 carbon atoms, which is optionally substituted by halogen, hydroxyl or cyano or by aryl, aryloxy or arylthio having in each case 6 to 10 carbon atoms or by a 5- to 7-membered, saturated or unsaturated heterocyclic radical having up to 3 hetero atoms from the series comprising S, N and O, it being possible for the cyclic radicals in turn to be substituted by halogen or cyano or by straight-chain or branched alkyl, alkoxy, alkylthio, alkoxycarbonyl, halogenoalkyl, halogenoalkoxy or halogenoalkylthio having in each case up to 4 carbon atoms, or denote aryl having 6 to 10 carbon atoms or a 5- to 7-membered, saturated or unsaturated heterocyclic radical having up to 3 hereto atoms from the series comprising S, N and O, which are optionally substituted up to twice in an identical or different manner by halogen or cyano or by straight-chain or branched alkyl, alkoxy, alkylthio, alkoxycarbonyl, halogenoalkyl, halogenoalkoxy or halogenoalkylthio having in each case up to 4 carbon atoms,

or

R¹¹ and R¹², together and including the nitrogen atom, form a 3- to 8-membered, saturated or unsaturated heterocyclic radical, which can optionally be interrupted by an oxygen atom or by a radical of the formula S(O)_(d), --CO--or --NR¹⁵,

wherein

d denotes the number 0, 1 or 2,

R¹⁵ denotes hydrogen or aryl having 6 to 10 carbon atoms, which is optionally substituted up to twice in an identical or different manner by halogen or cyano or by straight-chain or branched alkyl, alkoxy, alkylthio or alkoxycarbonyl having in each case up to 8 carbon atoms or halogenoalkyl, halogenoalkoxy or halogenoalkylthio having in each case up to 4 carbon atoms, or denotes a cyclic, straight-chain or branched saturated or unsaturated hydrocarbon radical having up to 8 carbon atoms, which is optionally substituted by hydroxyl or halogen or by aryl having 6 to 10 carbon atoms or a 5- to 7-membered, saturated or unsaturated heterocyclic radical having up to 3 hetero atoms from the series comprising S, N and O, it being possible for the cyclic radicals in turn to be substituted up to twice in an identical or different manner by halogen or cyano or by straight-chain or branched alkyl, alkoxy, alkylthio, alkoxycarbonyl, halogenoalkyl, halogenoalkoxy or halogenoalkylthio having in each case up to 4 carbon atoms,

and the heterocyclic radical is optionally substituted by straight-chain or branched alkoxy or alkylthio having in each case up to 4 carbon atoms, halogen, aryl having 6 to 10 carbon atoms or a 5- to 7-membered, saturated or unsaturated heterocyclic radical having up to 3 hereto atoms from the series comprising S, N and O or by straight-chain or branched alkyl having up to 4 carbon atoms, which in turn can be substituted by aryl having 6 to 10 carbon atoms,

A denotes a direct bond or an oxygen atom,

R¹³ denotes hydrogen or aryl having 6 to 10 carbon atoms or a 5- to 7-membered, saturated or unsaturated heterocyclic radical having up to 3 hetero atoms from the series comprising S, N and O, the cyclic radicals optionally being substituted up to 3 times in an identical or different manner by halogen or cyano or by straight-chain or branched alkyl, alkoxy, alkylthio, alkoxycarbonyl, halogenoalkyl, halogenoalkoxy or halogenoalkylthio having in each case up to 4 carbon atoms, or denotes a cyclic, straight-chain or branched, saturated or unsaturated hydrocarbon radical having up to 10 carbon atoms, which is optionally interrupted up to 3 times in an identical or different manner by oxygen or by --CO--, --CO--NH--, --O--CO--, --CO--O--, --NH--CO--, --SO₂ --NH--, --NH--SO₂ --, --S(O)_(e) -- or --NH¹⁶ --,

wherein

e has the abovementioned meaning of d and is identical to or differant from this,

R¹⁶ has the abovementioned meaning of R¹⁵ and is identical to or different from this,

or the hydrocarbon radical is optionally interrupted up to 3 times in an identical or different manner by arylidene having 6 to 10 carbon atoms or heterocyclic radicals of the formulae ##STR3## wherein

f and g are identical or different and denote the number 1 or 2,

and wherein arylidene can be substituted by halogen or cyano or by straight-chain or branched alkyl, alkoxy, alkylthio, alkoxycarbonyl, halogenoalkyl, halogenoalkoxy or halogenoalkylthio having in each case up to 4 carbon atoms,

and the hydrocarbon radical is optionally substituted up to 3 times in an identical or different manner by cycloalkyl having 3 to 8 carbon atoms, halogen, nitro, cyano, hydroxyl, --O--NO₂, or straight-chain or branched alkylthio, alkoxy or acyloxy having in each case up to 8 carbon atoms or by aryl, aryloxy or arylthio having in each case 6 to 10 carbon atoms or by a 5- to 7-membered, saturated or unsaturated heterocyclic radical having up to 3 hetero atoms from the series comprising S, N and O, it being possible for the cyclic radicals in turn to be substituted up to 3 times in an identical or different manner by halogen or cyano or by straight-chain or branched alkyl, alkoxy, alkylthio, alkoxycarbonyl, halogenoalkyl, halogenoalkoxy or halogenoalkylthio having in each case up to 4 carbon atoms, or the hydrocarbon radical is optionally substituted by a group of the formula --CO₂ --R¹⁷, --CONR¹⁸ R¹⁹, --NR²⁰ R²¹, NH--SO₂ --X and/or --NR²² --CO₂ R²³,

wherein

R¹⁷ has the abovementioned meaning of R¹⁵ and is identical to or different from this

and

R¹⁸, R¹⁹, R²⁰, R²¹, R²² and R²³ have the above-mentioned meaning of R¹¹ and R¹² and are identical to or different from these,

and

X denotes phenyl, which is optionally substituted by methyl,

R³ represents cyano, nitro or formyl,

or

R³ and R⁴ together form a radical of the formula ##STR4## wherein

E denotes an oxygen or sulphur atom or the --CH₂ --group,

R⁵ represents a cyclic, straight-chain or branched, saturated or unsaturated hydrocarbon radical having up to 12 carbon atoms, which is optionally interrupted up to twice in an identical or different manner by oxygen or sulphur,

and which is optionally substituted up to 3 times in an identical or different manner by cycloalkyl having 3 to 8 carbon atoms, straight-chain or branched acyloxy having up to 4 carbon atoms, halogen, nitro, cyano or hydroxyl or by aryl, aryloxy or arylthio having in each case 6 to 10 carbon atoms or by a 5- to 7-membered, saturated or unsaturated optionally fused heterocyclic radical having up to 5 hereto atoms from the series comprising S, N and O, it being possible for the cyclic radicals in turn to be substituted up to 3 times in an identical or different manner by halogen, cyano, nitro or hydroxyl or by straight-chain or branched alkyl or alkoxy having in each case up to 4 carbon atoms, trifluoromethyl, trifluoromethoxy or trifluoromethylthio or by a group of the formula --NR²⁴ R²⁵,

wherein

R²⁴ and R²⁵ have the abovementioned meaning of R¹¹ and R¹² and are identical to or different from these,

or the hydrocarbon radical is optionally substituted by a group of the formula --CO₂ --R²⁶, --CONR²⁷ R²⁸,

--NR²⁹ R³⁰, ---NR³¹ --CO₂ R³² or --NR³³ --SO₂ R³⁴,

wherein

R²⁶ has the abovementioned meaning of R¹⁵ and is identical to or different from this

and

R²⁷, R²⁸, R²⁹, R³⁰, R³¹, R³², R³³ and R³⁴ have the above-mentioned meaning of R¹¹ and R¹² and are identical to or different from these,

or

R⁵ represents a 5- to 7-membered, saturated or unsaturated heterocyclic radical having up to 4 hereto atoms from the series comprising S, N and O, which is optionally substituted up to 3 times in an identical or different manner by halogen, amino, cyano or nitro or by straight-chain or branched alkyl, alkoxy, alkylthio, alkoxycarbonyl, halogenoalkyl, halogenoalkoxy or halogenoalkylthio having in each case up to 4 carbon atoms or by C₁ -C₄ -mono- or -dialkylamino,

or

R⁵ represents a group of the formula D-R³⁵,

wherein

D denotes the CO or --S(O)_(h) group or an oxygen atom,

wherein

h denotes the number 0, 1 or 2,

and

R³⁵ denotes aryl having 6 to 10 carbon atoms or a 5- to 7-membered, saturated or unsaturated heterocyclic radical having up to 3 hetero atoms from the series comprising S, N and O, which is optionally substituted up to 3 times in an identical or different manner by halogen, amino, cyano or nitro or by straight-chain or branched alkyl, alkoxy, alkylthio, alkoxycarbonyl, halogenoalkyl, halogenoalkoxy or halogenoalkylthio having in each case up to 4 carbon atoms or by C₁ -C₄ -mono- or -dialkylamino,

or

R³⁵ denotes hydrogen or a cyclic, straight-chain or branched, saturated or unsaturated hydrocarbon radical having up to 8 carbon atoms, which is optionally interrupted by oxygen or sulphur,

and which is optionally substituted by halogen or aryl, aryloxy or arylthio having in each case 6 to 10 carbon atoms or by a 5- to 7-membered, saturated or unsaturated heterocyclic radical having up to 3 hetero atoms from the series comprising S, N and O, it being possible for the cyclic radicals in turn to be substituted by halogen, trifluoromethyl, methyl, methoxy, nitro or methylthio, or is substituted by a group of the formula --NR³⁶ R³⁷

wherein

R³⁶ and R³⁷ have the abovementioned meaning of R¹¹ and R¹² and are identical to or different from these,

and salts thereof,

with the proviso that R⁵ may not represent optionally halogen-substituted pyridyl or thienyl.

Physiologically acceptable salts can be salts of the compounds according to the invention with inorganic or organic acids. Preferred salts are those with inorganic acids, such as, for example, hydrochloric acid, hydrobromic acid, phosphoric acid or sulphuric acid, or salts with organic carboxylic or sulphonic acids, such as, for example, acetic acid, maleic acid, fumaric acid, malic acid, citric acid, tartaric acid, lactic acid, benzoic acid or methanesulphonic acid, ethanesulphonic acid, phenylsulphonic acid, toluenesulphonic acid or naphthalenedisulphonic acid.

The compounds according to the invention exist in stereoisomeric forms which either behave as mirror images (enantiomers) or do not behave as mirror images (diastereomers). The invention relates both to antipodes and to racemic forms, as well as to the diastereomer mixtures. The racemic forms, like the diastereomers, can be separated into the stereoisomerically uniform constituents in a known manner (compare E. L. Eliel, Stereochemistry of Carbon Compounds, McGraw Hill, 1962).

Preferred compounds of the general formula (I) are those in which

R¹ and R⁴ are identical or different and represent hydrogen, amino, cyano, formyl or trifluoromethyl or represent straight-chain or branched alkyl having up to 4 carbon atoms, which is optionally substituted by hydroxyl or by a group of the formula --NR⁶ R⁷, --O--CO--R⁸, --O--(CH₂)_(a) --OR^(8') or --O--(CH₂)_(b),--NR⁹ R¹⁰,

wherein

R⁶, R⁷, R⁹ and R¹⁰ are identical or different and denote hydrogen or straight-chain or branched alkyl having up to 4 carbon atoms,

R⁸ and R⁸ ' are identical or different and denote straight-chain or branched alkyl having up to 4 carbon atoms,

and

a and b are identical or different and denote the number 2, 3, 4 or 5,

R² represents a group of the formula --CO --NR¹¹ R¹² or --CO--A--R¹³,

wherein

R¹¹ and R¹² are identical or different and denote hydrogen or a straight-chain, branched or cyclic, saturated or unsaturated hydrocarbon radical having up to 6 carbon atoms, which is optionally substituted by fluorine, chlorine, hydroxyl, phenyl or pyridyl, it being possible for the cyclic radicals in turn to be substituted by fluorine or chlorine or by alkyl, alkoxy, alkylthio or alkoxycarbonyl having in each case up to 2 carbon atoms, trifluoromethyl or trifluoromethoxy, or denote phenyl or pyridyl, which are optionally substituted by fluorine or chlorine or by alkyl, alkoxy, alkylthio or alkoxycarbonyl having in each case up to 2 carbon atoms, trifluoromethyl or trifluoromethoxy,

or

R¹¹ and R¹², together and including the nitrogen atom, form a 3- to 8-membered, saturated or unsaturated heterocyclic radical which can optionally be interrupted by an oxygen atom or by a radical of the formula S(O)_(d), --CO--or --NR¹⁵,

wherein

d denotes the number 0, 1 or 2,

R¹⁵ denotes hydrogen or phenyl, which is optionally substituted by fluorine, chlorine, methyl, ethyl, methoxy, ethoxy, trifluoromethyl or trifluoromethoxy, or denotes a cyclic, straight-chain or branched, saturated or unsaturated hydrocarbon radical having up to 4 carbon atoms, which is optionally substituted by chlorine, fluorine or phenyl or by a 5- to 7-membered, saturated or unsaturated heterocyclic radical having up to 3 hetero atoms from the series comprising S, N and O, it being possible for the cyclic radicals in turn to be substituted by fluorine, chlorine, methyl, methoxy, methylthio, trifluoromethyl or trifluoromethoxy,

A denotes a direct bond or an oxygen atom,

R¹³ denotes hydrogen, phenyl or pyridyl, which are optionally substituted by fluorine, chlorine, methyl, methoxy, methylthio, trifluoromethyl or trifluoromethoxy, or denotes a cyclic, straight-chain or branched, saturated or unsaturated hydrocarbon radical having up to 8 carbon atoms, which is optionally interrupted up to twice in an identical or different manner by oxygen or by --CO--, --CO--NH--, --O--CO--, --CO--O--, --NH--CO--, --SO₂ --NH--, --NH--SO₂ --, --S(O)_(e) --or --NR¹⁶ --,

wherein

e has the abovementioned meaning of d and is identical to or different from this,

R¹⁶ has the abovementioned meaning of R¹⁵ and is identical to or different from this,

or the hydrocarbon radical is optionally interrupted up to twice in an identical or different manner by arylidene having 6 to 10 carbon atoms or heterocyclic radicals of the formulae ##STR5## wherein f and g are identical or different and denote the number 1 or 2,

and the hydrocarbon radical is optionally substituted up to twice in an identical or different manner by cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, fluorine, chlorine, nitro, cyano, hydroxyl, --O--NO₂ or straight-chain or branched alkylthio, alkoxy or acyloxy having in each case up to 4 carbon atoms or by phenyl, phenoxy, phenylthio or pyridyl, it being possible for the cyclic radicals in turn to be substituted by fluorine, chlorine, cyano, methyl, methoxy, methylthio, trifluoromethyl or trifluoromethoxy, or the hydrocarbon radical is optionally substituted by a group of the formula --CO₂ --R¹⁷, --CONR¹⁸ R¹⁹, --NR²⁰ R²¹, --NH--SO₂ --X and/or --NR²² --CO₂ R²³,

wherein

R¹⁷ has the abovementioned meaning of R¹⁵ and is identical to or different from this

and

R¹⁸, R¹⁹, R²⁰, R²¹, R²² and R²³ have the above-mentioned meaning of R¹¹ and R¹² and are identical to or different from these,

and

X denotes phenyl, which is optionally substituted by methyl,

R³ represents cyano, nitro or formyl,

or

R³ and R⁴ together form a radical of the formula ##STR6## wherein

E denotes an oxygen or sulphur atom or the --CH₂ --group,

R⁵ represents a cyclic, straight-chain or branched, saturated or unsaturated hydrocarbon radical having up to 10 carbon atoms, which is optionally interrupted by oxygen or sulphur,

and which is optionally substituted up to twice in an identical or different manner by cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, fluorine, chlorine, bromine, acyloxy having up to 2 carbon atoms, cyano or hydroxyl or by phenyl, phenyloxy or phenylthio or by a 5- to 7-membered, saturated or unsaturated heterocyclic radical having up to 3 hetero atoms from the series comprising S, N and O, it being possible for the phenyl and the heterocyclic radicals in turn to be substituted up to twice in an identical or different manner by fluorine, chlorine, bromine, hydroxyl, methyl, ethyl, methoxy, ethoxy, trifluoromethyl, trifluoromethoxy or trifluoromethylthio or by a group of the formula --NR²⁴ R²⁵,

wherein

R²⁴ and R²⁵ have the abovementioned meaning of R¹¹ and R¹² and are identical to or different from these,

or the hydrocarbon radical is optionally substituted by a group of the formula --CO₂ --R²⁶, --CONR²⁷ R²⁸, --NR²⁹ R³⁰, --NR³¹ --CO₂ R³² or --NR³³ --SO₂ R³⁴

wherein

R²⁶ has the abovementioned meaning of R¹⁵ and is dentical to or different from this

and

R²⁷, R²⁸, R²⁹, R³⁰, R³¹, R³², R³³ and R³⁴ have the above-mentioned meaning of R¹¹ and R¹² and are identical to or different from these,

or

R⁵ represents a 5- to 7-membered, saturated or unsaturated heterocyclic radical having up to 4 hetero atoms from the series comprising S, N and O, which is optionally substituted up to twice in an identical or different manner by fluorine, chlorine, bromine, cyano or nitro or by alkyl, alkoxy, alkylthio, alkoxycarbonyl, halogenoalkyl, halogenoalkoxy or halogenoalkylthio having in each case up to 2 carbon atoms or amino or by C₁ -C₄ -mono- or -dialkylamino,

or

R⁵ represents a group of the formula D-R³⁵,

wherein

D denotes the CO or --S(O)_(h) group or am oxygen atom,

wherein

h denotes the number 0, 1 or 2,

and

R³⁵ denotes phenyl or a 5- to 7-membered, saturated or unsaturated heterocyclic radical having up to 3 hereto atoms from the series comprising S, N and O, which are optionally substituted up to twice in an identical or different manner by fluorine, chlorine, bromine, cyano or nitro or by straight-chain or branched alkyl, alkoxy, alkylthio, alkoxycarbonyl, halogenoalkyl, halogenoalkoxy or halogenoalkylthio having in each case up to 4 carbon atoms or amino or by C₁ -C₄ -mono- or -dialkylamino,

or

R³⁵ denotes hydrogen or a cyclic, straight-chain or branched, saturated or unsaturated hydrocarbon radical having up to 8 carbon atom, which is optionally interrupted by oxygen or sulphur, and which can optionally be substituted by fluorine, chlorine, phenyl, phenoxy or phenylthio, or is substituted by a group of the formula --NR³⁶ R³⁷,

wherein

R³⁶ and R³⁷ have the abovementioned meaning of R¹¹ and R¹² and are identical to or different from these,

and salts thereof, with the proviso that R⁵ may not represent optionally halogen-substituted pyridyl or thienyl.

Particularly preferred compounds of the general formula (I) are those

in which

R¹ and R⁴ are identical or different and represent hydrogen, amino, trifluoromethyl, methyl or ethyl,

R² represents a group of the formula --CO--NR¹¹ R¹² or --CO--A--R¹³

wherein

R¹¹ and R¹² are identical or different and denote hydrogen or a straight-chain, branched or cyclic, saturated or unsaturated hydrocarbon radical having up to 6 carbon atoms, or denote phenyl, which is optionally substituted by fluorine, chlorine, methyl or methoxy,

A denotes a direct bond or an oxygen atom,

R¹³ denotes hydrogen or a cyclic, straight-chain or branched, saturated or unsaturated hydrocarbon radical-having up to 8 carbon atoms, which is optionally interrupted by oxygen or sulphur or by --CO--NH--, --O--CO--, --CO--O--, --NH--CO--, --SO₂ --NH--, --NH--SO₂ -- or --NR¹⁶,

wherein

R¹⁶ denotes hydrogen or straight-chain or branched alkyl having up to 4 carbon atoms,

or the hydrocarbon radical is interrupted by heterocyclic radicals of the formulae ##STR7## in which

f and g are identical or different and denote the number 1 or 2,

and the hydrocarbon radical is optionally substituted by cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, fluorine, chlorine, nitro, cyano or hydroxyl or by phenyl, phenoxy, phenylthio or pyridyl, which can in turn be substituted by fluorine, chlorine, methyl, methoxy, methylthio, trifluoromethyl or trifluoromethoxy, or the hydrocarbon radical is optionally substituted by a group of the formula --CO₂ R¹⁷, --CONR¹⁸ R¹⁹, --NR²⁰ R²¹, --NH--SO₂ --X and/or --NR²² --CO₂ R²³,

wherein

R²⁰ and R²¹ are identical or different and denote hydrogen or a straight-chain, branched or cyclic, saturated or unsaturated hydrocarbon radical having up to 6 carbon atoms, which is optionally substituted by fluorine, chlorine, pyridyl or phenyl, which can in turn be substituted by fluorine, chlorine, methyl or methoxy,

or

denotes phenyl, which is optionally substituted by fluorine, chlorine, methyl or methoxy,

or

R²⁰ and R²¹, together and including the nitrogen atom, form a 5- to 6-membered, saturated or unsaturated heterocyclic radical, which can optionally contain up to 2 further hetero atoms from the series comprising S, N and O and which is optionally also substituted by straight-chain or branched alkyl having up to 4 carbon atoms, benzyl or phenyl,

X denotes phenyl, which is optionally substituted by methyl,

R¹⁷, R¹⁸, R¹⁹, R²² and R²³ are identical or different and denote hydrogen or straight-chain or branched alkyl having up to 6 carbon atoms, which is optionally substituted by phenyl, or denote phenyl which is optionally substituted by fluorine, chlorine or bromine,

R³ represents cyano, nitro or formyl,

or

R³ and R⁴ together form a radical of the formula ##STR8## wherein

E denotes an oxygen or sulphur atom or the --CH₂ --group,

R⁵ represents a cyclic, straight-chain or branched, saturated or unsaturated hydrocarbon radical having up to 8 carbon atoms, which is optionally interrupted by oxygen or sulphur,

and which is optionally substituted by cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, fluorine, chlorine, nitro, cyano, hydroxyl or by phenyl, phenyloxy or phenylthio or by a 5- to 7-membered, saturated or unsaturated heterocyclic radical having up to 2 hetero atoms from the series comprising S, N and O, it being possible for the phenyl rings and heterocyclic radicals in turn to be substituted up to twice in an identical or different manner by fluorine, chlorine, methyl, methoxy, trifluoromethyl or trifluoromethoxy or by a group of the formula --NR²⁴ R²⁵,

wherein

R²⁴ and R²⁵ have the abovementioned meaning of R¹¹ and R¹² and are identical to or different from these, or the hydrocarbon radical is optionally substituted by a group of the formula --CO₂ --R²⁴, --CONR²⁷ R²⁶, --NR²⁹ R³⁰, --NR³¹ -CO₂ R³² or --NR³³ --SO₂ R³⁴,

wherein

R²⁶ denotes alkyl having 1-4 C atoms or phenyl,

and

R²⁷, R²⁸, R²⁹, R³⁰, R³¹, R³², R³³ and R³⁴ have the above-mentioned meaning of R¹¹ and R¹² and are identical to or different from these,

or

R⁵ represents a 5- to 6-membered, saturated or unsaturated heterocyclic radical having up to 2 hereto atoms from the series comprising S, N and O, which is optionally substituted by fluorine, chlorine, methyl, methoxy, methylthio or trifluoromethyl,

or

R⁵ represents a group of the formula D-R³⁵,

wherein

D denotes the --S(O)_(h) group or an oxygen atom,

wherein

h denotes the number 0, 1 or 2,

and

R³⁵ denotes phenyl, which is optionally substituted by fluorine, chlorine, bromine, methyl, methoxy, methylthio, trifluoromethyl or amino or by C₁ -C₂ -mono- or -dialkylamino,

or

R³⁵ denotes hydrogen or a cyclic, straight-chain or branched, saturated or unsaturated hydrocarbon radical having up to 6 carbon atoms, which is optionally interrupted by oxygen or sulphur, and which is optionally substituted by fluorine, chlorine or phenyl, or is substituted by a group of the formula --NR³⁶ R³⁷,

wherein

R³⁶ and R³⁷ have the abovementioned meaning of R¹¹ and R¹² and are identical to or different from these, and salts thereof, with the proviso that R⁵ may not represent optionally halogen-substituted pyridyl or thienyl.

Especially preferred compounds of the general formula (I) are those

in which

R¹ represents hydrogen, methyl, ethyl, trifluoromethyl or amino,

R⁴ represents hydrogen, methyl or amino,

R² represents a group of the formula --CO--NR¹¹ R¹² or --CO--A--R¹³,

wherein

R¹¹ and R¹² are identical or different and denote hydrogen or a straight-chain, branched or cyclic, saturated or unsaturated hydrocarbon radical having up to 6 carbon atoms,

A denotes a direct bond or an oxygen atom,

R¹³ denotes hydrogen or a cyclic, straight-chain or branched, saturated or unsaturated hydrocarbon radical having up to 8 carbon atoms, which is optionally interrupted by oxygen or sulphur or by --O--CO--, --CO--O-- or --NR¹⁶,

wherein

R¹⁶ denotes hydrogen or methyl and the hydrocarbon radical is optionally substituted by cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, fluorine, chlorine, nitro, cyano, hydroxyl, --O--NO₂ or by phenyl, phenoxy, phenylthio or pyridyl, which can in turn be substituted by fluorine, chlorine, methyl, methoxy, methylthio, trifluoromethyl or trifluoromethoxy, or

the hydrocarbon radical is optionally substituted by a group of the formula --CO₂ --R¹⁷, --NH--SO₂ --X and/or --NR²⁰ R²¹

wherein

R¹⁷ denotes hydrogen, methyl or ethyl,

R²⁰ and R²¹ are identical or different and denote hydrogen or a straight-chain, branched or cyclic, saturated or unsaturated hydrocarbon radical having up to 5 carbon atoms, which is optionally substituted by phenyl, which in turn can be substituted by fluorine, chlorine, methyl or methoxy,

or

R²⁰ and R²¹, together and including the nitrogen atom, form a piperidine or piperazine ring, which can optionally be substituted by methyl, ethyl, phenyl or benzyl,

X denotes phenyl, which is optionally substituted by methyl,

R³ represents cyano or nitro,

or

R³ and R⁴ together form a radical of the formula ##STR9## wherein

E denotes an oxygen or sulphur atom or the --CH₂ -- group,

R⁵ represents a cyclic, straight-chain or branched, saturated or unsaturated hydrocarbon radical having up to 6 carbon atoms, which is optionally interrupted by oxygen or sulphur,

and which is optionally substituted by cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, fluorine, chlorine, cyano or hydroxyl or by phenyl, phenyloxy or phenylthio or by a 5- to 7-membered, saturated or unsaturated heterocyclic radical having up to 2 hetero atoms from the series comprising S, N and O, it being possible for the cyclic radicals in turn to be substituted by fluorine, chlorine, methyl, methoxy, trifluoromethyl or trifluoromethoxy or by a group of the formula --NR²⁴ R²⁵,

wherein

R²⁴ and R²⁵ denote hydrogen, phenyl, benzyl or straight-chain or branched alkyl having up to 4 carbon atoms,

or the hydrocarbon radical is optionally substituted by a group of the formula --NR²⁹ R³⁰,

wherein

R²⁹ and R³⁰ are identical or different and denote hydrogen, phenyl or straight-chain or branched alkyl having up to 4 carbon atoms, which is optionally substituted by phenyl,

or

R⁵ represents a 5- to 6-membered, saturated or unsaturated heterocyclic radical having up to 2 hetero atoms from the series comprising S, N and O, which is optionally substituted by fluorine, chlorine, methyl, methoxy, methylthio or trifluoromethyl,

or

R⁵ represents a group of the formula D-R³⁵,

wherein

D denotes an oxygen or sulphur atom,

and

R³⁵ denotes phenyl, which is optionally substituted by fluorine, chlorine, methyl, methoxy, methylthio, trifluoromethyl, methyl or amino or by C₁ -C₂ -mono- or -dialkylamino,

or

R³⁵ denotes hydrogen or a cyclic, straight-chain or branched, saturated or unsaturated hydrocarbon radical having up to 6 carbon atoms, which is optionally substituted by fluorine, chlorine or phenyl, and salts thereof, with the proviso that R⁵ may not represent optionally halogen-substituted pyridyl or thienyl.

A process has furthermore been found for the preparation of the compounds of the general formula (I) according to the invention, characterized in that

in the case where R³ represents cyano, nitro or formyl,

[A] compounds of the general formula (II) ##STR10## in which

R⁵ has the abovementioned meaning,

are first reacted with acyl compounds of the general formula (III)

R³ --CO--CH₂ - R⁴ (III)

in which

R³ and R⁴ have the abovementioned meaning, if appropriate with isolation of the ylidene compounds of the general formula (IV) ##STR11## in which R³, R⁴ and R⁵ have the abovementioned meaning, and the products are then reacted with compounds of the formula (V) ##STR12## in which R¹ and R² have the abovementioned meaning, and a reactive ammonium compound, for example ammonium acetate, or directly with enamino compounds of the general formula (VI) ##STR13## in which R¹ and R² have the abovementioned meaning, in inert solvents,

or

[B] compounds of the general formula (II) are first reacted with compounds of the general formula (V), if appropriate with isolation of the ylidene compounds of the general formula (VII) ##STR14## in which R¹, R² and R⁵ have the abovementioned meaning, and the products are then reacted either with compounds of the general formula (III) in the presence of ammonium compounds or directly with compounds of the general formula (VIII) ##STR15## in which R³ and R⁴ have the abovementioned meaning,

or

[C] in the case where R³ and R⁴ together form a radical of the formula ##STR16## wherein E' represents an oxygen or sulphur atom, compounds of the general formula (IX) ##STR17## in which R¹, R² and R⁵ have the abovementioned meaning,

L represents C₁ -C₄ -alkyl

and

T represents C₁ -C₄ -acyloxy or acylthio,

are first prepared by the methods described under [A] and [B] and basic or acid cyclization is then carried out by known methods,

or

[D] in that, in the case where E represents the --CH₂ -- group,

compounds of the general formula (II) are first reacted with acyl compounds of the general formula (X)

    L--CO--CH.sub.2 -R.sup.2                                   (X)

in which

R² has the abovementioned meaning

and

L has the abovementioned meaning of R¹, and in the case of the hydroxyl and/or amino functions, these are optionally present in protected form, if appropriate with isolation of the ylidene compounds of the general formula (XI) ##STR18## in which R², R⁵ and L have the abovementioned meaning, and the products are then reacted with a compound of the formula (XII) ##STR19## and a reactive ammonium compound, for example ammonium acetate, if appropriate with isolation of the intermediate products of the general formula (XIII) ##STR20## in which R², R³ and L have the abovementioned meaning, in inert solvants, and water is subsequently separated off in a last step, if appropriate in the presence of an auxiliary.

The processes according to the invention can be illustrated by way of example by the following equation: ##STR21##

Suitable solvents here are all the inert organic solvents which do not change under the reaction conditions. These include, preferably, alcohols, such as methanol, ethanol, propanol or isopropanol, or ethers, such as diethyl ether, dixoane, tetrahydrofuran, glycol dimethyl ether or diethylene glycol dimethyl ether, acetonitrile or amides, such as hexamethylphosphoric acid triamide or dimethylformamide, or acetic acid or halogenated hydrocarbons, such as methylene chloride or carbon tetrachloride, or hydrocarbons, such as benzene or toluene. It is also possible to use mixtures of the solvents mentioned.

Preferred solvents are methanol, isopropanol, ethanol and n-propanol, acetonitrile or tetrahydrofuran, depending on the particular process variant, [A], [B], [C] and [D].

The reaction temperatures can be varied within a relatively wide range. The reaction is in general carried out at between +10° C. and +150° C., preferably between +20° C. and +100° C., in particular at the boiling point of the particular solvent.

The reaction can be carried out under normal pressure, but also under increased or reduced pressure (for example 0.5 to 3 bar). It is in general carried out under normal pressure.

Suitable chiral ester radicals are all the esters of enantiomerically pure alcohols such as, for example, 2-butanol, 1-phenylethanol, lactic acid, lactic acid esters, mandelic acid, mandelic acid esters, 2-amino alcohols, sugar derivatives, hydroxy amino acid derivatives and many other enantiomerically pure alcohols.

The diastereomers are in general separated either by fractional crystallization, by column chromatography or by Craig partition. The optimum process must be decided upon from case to case, and it is sometimes also expedient to use combinations of the individual processes.

Separation by crystallization or Craig partition or a combination of the two processes is particularly suitable.

The compounds of the general formula (II) are new and can preferably be obtained by a process analogous to known processes, by a procedure in which 4-amino-3-hydroxyphthalide of the formula (XIV) ##STR22## is cyclized, either after isolation or directly in situ after hydrogenation of 4-nitro-3-hydroxyphthalide of the formula (XV) ##STR23## with compounds of the general formula (XVI)

    R.sup.5 --CH.sub.2 --CHO                                   (XVI)

to give compounds of the general formula (XVII) ##STR24## these are then converted with the customary reducing agents, such as, for example, lithium aluminium hydride, or via a mixed anhydride with sodium borohydride, into the alcohols of the general formula (XVIII) ##STR25## and these are then oxidized, either after isolation or directly in situ, with oxidizing agents, such as, for example, manganese dioxide, to give compounds of the general formula (II),

wherein

R⁵ in each case has the abovementioned meaning.

The process can be illustrated by the following equation: ##STR26##

The acyl compounds of the general formula (III) and (X) are known or can be prepared by customary methods.

The compounds of the general formulae (V), (VI), (VIII) and (XII) are known.

The ylidene compounds (IV), (VII) and (XI) are new, but can be prepared by customary methods.

The compounds of the general formula (IX) are new, but can be prepared by known methods, for example by reacting benzylidene compounds of the general formula (IV) with chloroacetic acid esters and ammonium compounds.

The compounds of the general formula (XIII) are new and can be prepared as described above.

The above preparation processes are given merely for illustration. The preparation of the compounds of the formula (I) is not limited to these processes, but any modification of these processes can be used in the same manner for preparation of the compounds according to the invention.

The compounds according to the invention display an unforeseeable, valuable pharmacological action spectrum. They influence the contractility of the heart and the tone of the smooth muscle, and in particular they display positively inotropic actions. They can therefore be employed in medicaments for influencing pathologically altered blood pressure, as coronary therapeutics and for the treatment of cardiac insufficiency. They can furthermore be used for the treatment of disturbances in cardiac rhythm, for lowering blood sugar, for detumescence of mucosa and for influencing the salt and fluid balance.

The cardiac and vascular actions were found on the isolated perfused hearts of guinea-pigs. The hearts of guinea-pigs weighing 250 to 350 g are used for this. The animals are sacrificed by a blow to the head, the thorax is opened and a metal cannula is inserted into the exposed aorta. The heart is removed with the lungs from the thorax and connected to the perfusion apparatus, with perfusion running, via an aortic cannula. The lungs are removed at the lung roots and the perfusion medium used is a Krebs-Henseleit solution (118.5 mmol/l of NaCl, 4.75 mmol/l of KCl, 1.19 mmol/l of KH₂ PO₄, 1.19 mmol/l of MgSO₄, 25 mmol/l of NaHCO₃, 0.013 mmol/l of Na₂ EDTA), the CaCl₂ content of which is 1.2 mmol/l. 10 mmol/l of glucose are added as energy-supplying substrate, and the solution is filtered particle-free before the perfusion. The solution is gassed with carbogen (95% O₂, 5% CO₂) to maintain the pH at 7.4. The hearts are perfused with a constant flow rate (10 ml/minute) at 32° C. by means of a roller squeezing pump.

To measure the cardiac function, a latex balloon which is filled with liquid and connected to a pressure transducer via a column of liquid is inserted through the left auricle into the left ventricle and the isovolumetric contractions are recorded on a high-speed recorder. The perfusion pressure is recorded by means of a pressure transducer connected to the perfusion system before the heart. Under these conditions, a reduction in the perfusion pressure indicates coronary dilation and increase or decrease in the left ventricular contraction amplitude indicates a reduction or, respectively, an increase in cardiac contractility. The compounds according to the invention are perfused into the perfusion system in suitable dilutions shortly before the isolated heart.

The new active compounds can be converted in a known manner into the customary formulations, such as tablets, coated tablets, pills, granules, aerosols, syrups, emulsions, suspensions and solutions, using inert, nontoxic, pharmaceutically suitable excipients or solvents. The therapeutically active compound should in each case be present here in a concentration of about 0.5 to 90% by weight of the total mixture, that is to say in amounts which are sufficient to achieve the stated dosage range.

The formulations are prepared, for example, by extending the active compounds with solvents and/or excipients, if appropriate using emulsifying agents and/or dispersing agents, and, for example, in the case where water is used as the diluent, organic solvents can be used as auxiliary solvents if appropriate.

Administration is effected in the customary manner, preferably orally or parenterally, in particular perlingually or intravenously.

In general, it has proved advantageous in the case of intravenous administration to administer amounts of about 0,001 to 1 mg/kg, preferably about 0.01 to 0.5 mg/kg of body weight in order to achieve effective results, and in the case of oral administration the dosage is about 0.01 to 20 mg/kg, preferably 0.1 to 10 mg/kg of body weight.

Nevertheless, it may at times be necessary to deviate from the amounts mentioned, and in particular as a function of the body weight or of the nature of the administration route, of the behaviour of the individual towards the medicament, of the nature of the formulation thereof and of the time or interval at which administration takes place. Thus in some cases it may suffice to manage with less than the abovementioned minimum amount, while in other cases the upper limit mentioned must be exceeded. Where relatively large amounts are administered, it may be advisable to divide these into several individual doses over the course of the day.

STARTING COMPOUNDS EXAMPLE 1

Ethyl 4-acetoxy-2-(3-phenoxy-quinolin-5-ylidene)-3-oxobutyrate ##STR27## 2.49 g (10 mmol) of 3-phenoxyquinoline-5-aldehyde are heated under reflux in 30 ml of methylene chloride with 2.07 g (11 mmol) of ethyl 4-acetoxyacetate, 0.05 ml of acetic acid and 0.1 ml of piperidine overnight, using a water separator. The mixture is cooled, washed twice with water and concentrated. 4.2 g of a yellowish oil are obtained.

EXAMPLE 2

Phenylthioacetaldehyde ##STR28## 23 g (1 mol) of sodium are dissolved in 400 ml of ethanol. After cooling, 110 g (1 mol) of thiophenol are added. 197 g (1 mol) of bromoacetaldehyde diethyl acetal are added dropwise to this mixture. The mixture is heated under reflux for 24 hours and cooled and the salt which has precipitated out is filtered off with suction. The filtrate is concentrated, water is added to the evaporation residue and the mixture is extracted 3 times with ether. The combined ether phases are washed with 1Nn sodium hydroxide solution and water, dried and concentrated. The evaporation residue obtained is dissolved in 1.2 l of tetrahydrofuran, 1 l of dilute hydrochloric acid is added and the mixture is heated under reflux for 3 hours. It is cooled, diluted with water and extracted 3 times with ether, and the combined ether phases are washed with water, sodium bicarbonate solution and water again, dried and concentrated. 150 g of crude oil are obtained, which is reacted without further purification.

EXAMPLE III

3-Phenylthio-quinoline-5-carboxylic acid ##STR29## 100 g (0,512 mol) of 3-hydroxy-4-nitro-phthalide are hydrogenated in 500 ml of ethanol, after addition of 10 g of Pd/barium sulphate, under 3.5 bar, during which the temperature may rise to 50° C. The mixture is filtered while hot with suction. 75 g (0.5 mol) of the compound from Example II are introduced into the filtrate and the mixture is heated under reflux overnight. After cooling, the product which has precipitated out is filtered off with suction and washed with ethanol. 35 g of a virtually colourless compound of melting point 287°-289° C. are obtained.

EXAMPLE IV

5-Hydroxymethyl-3-phenylthio-quinoline ##STR30## 28.1 g (0.1 mol) of the compound from Example III are dissolved in 800 ml of dry tetrahydrofuran, and 200 ml of a 1 molar solution of lithium aluminium hydride in tetrahydrofuran are added dropwise at 20°-30° C. The mixture is stirred at room temperature for 3 hours. 8 ml of water and 24 ml of dilute potassium hydroxide solution are added dropwise in succession, while cooling with ice. The mixture is subsequently stirred for 1 hour and filtered with suction over Celite, and the residue is rinsed with tetrahydrofuran. After the filtrate has been concentrated, 27 g of crude product are obtained, which is reacted further without purification.

EXAMPLE V

3-Phenylthio-quinoline-5-aldehyde ##STR31## 27 g of the compound from Example IV are dissolved in a mixture of 500 ml of dimethoxyethane and 500 ml of methylene chloride, and 165 g of manganese dioxide are added. The mixture is stirred at room temperature for 2 hours and filtered with suction over Celite, and the residue is washed with methylene chloride. After the filtrate has been concentrated, the evaporation residue obtained is purified by flash chromatography with toluene/ethyl acetate mixtures. 13.7 g of virtually colourless crystals of melting point 46°-47° C. are obtained.

EXAMPLE VI

3-Cyclohexyl-quinoline-5-carboxylic acid ##STR32## A mixture of 50 g of 4-nitro-3-hydroxyphthalide 200 ml of isopropanol is hydrogenated with 5 g of Pd/barium sulphate under 3.5 bar, during which the temperature rises to 55° C. When the hydrogenation has ended (about 30 minutes), the catalyst is filtered off hot with suction. 33 g (260 mmol) of cyclohexylacetaldehyde are added to the filtrate and, after addition of a catalytic amount of sodium methylate, the mixture is heated under reflux for 20 hours. After cooling, the crystals which have precipitated out are filtered off with suction and washed with isopropanol. 15 g of virtually colourless product with a melting point of over 280° C. are obtained.

EXAMPLE VII

3-Cyclohexyl-5-hydroxymethyl-quinoline ##STR33## 33.6 g (131.7 mmol) of the compound from Example VI are dissolved in 320 ml of dimethoxyethane and the solution is stirred with 197.6 mmol (27.6 ml) of triethylamine. After 30 minutes, 19.75 ml (197.5 mmol) of ethyl chlorocarbonate are added dropwise at 20°-30° C. The mixture is subsequently stirred for 30 minutes and the salt is filtered off with suction and washed with dimethoxyethane. The filtrate is concentrated and the residue is dissolved in a mixture of 320 ml of ethanol and 160 ml of water, and a solution of 9.25 g of sodium borohydride in 54 ml of water is added dropwise at 15°-18° C. The mixture is stirred at room temperature for 1 hour and the salt is filtered off with suction and washed with ethanol and water. The filtrate is concentrated to one third, methylene chloride and water are added and the phases are separated. The organic phase is washed 3 times with water, dried and concentrated. 26 g of a pale brown oil are obtained, which is employed without further purification.

EXAMPLE VIII

3-Cyclohexyl-quinoline-5-aldehyde ##STR34## 150 g of manganese dioxide are added to 26 g of the compound VII in 260 ml of methylene chloride. The mixture is stirred for 1 hour and the precipitate is filtered off with suction and washed with methylene chloride. The filtrate is concentrated. 20 g of a crystalline compound which has a melting point of 94°-95° C. after recrystallization from acetonitrile are obtained.

Preparation Examples EXAMPLE 1

Isopropyl 3-cyano-1,4-dihydro-2,6-dimethyl-4-(3-benzylquinolin-5-yl)-pyridine-5-carboxylate ##STR35## 0.72 g of isopropyl acetoacetate, 0.025 ml of acetic acid and 0.05 ml of piperidine are added to 1.24 g (5 mmol) of 3-benzylquinoline-5-aldehyde in 20 ml of methylene chloride and the mixture is heated at the boiling point overnight. It is cooled, diluted with methylene chloride, extracted twice by shaking with water, dried and concentrated. The resulting intermediate product is suspended in 15 ml of isopropanol, 0.41 g (5 mmol) of 3-aminocrotononitrile are added and the mixture is stirred at 80° C. for 20 hours. It is concentrated and the residue is purified by flash chromatography with toluene/ethyl acetate mixtures. After crystallization from ethanol/ether 1:1, 1.0 g of colourless crystals of melting point 188°-190° C. is obtained.

EXAMPLE 2

Ethyl 2-methyl-4-(3-phenoxy-quinolin-5-yl)-5-oxo-1,4,5,7-tetrahydrofuran [3,4-b]pyridine-3-carboxylate ##STR36## a) Preparation of the starting compound

Diethyl 2-acetoxy-6-methyl-4-(3-phenoxy-quinolin-5-yl)-1,4-dihydropyridine-3,5-dicarboxylate ##STR37## 4.2 g (10 mmol) of the compound from Example 1 are boiled under reflux in 50 ml of isopropanol with 1.4 g (11 mmol) of ethyl 3-aminocrotonate for 20 hours and the mixture is concentrated. 5.4 g of a brown oil are obtained. 5.4 g of the compound from Example 2a are dissolved in 60 ml of ethanol, 1.5 g of powdered potassium hydroxide are added and the mixture is heated under reflux for 1 hour. It is cooled, rendered neutral with 1N hydrochloric acid and concentrated. The evaporation residue is taken up in methylene chloride, washed with water, dried and concentrated. After crystallization with ethyl acetate, the product is filtered off with suction and washed with ethyl acetate. 1.1 g of a colourless compound of melting point 218-219° C. are obtained.

The compounds listed in Tables 1, 3, 5, 6 and 7 are prepared analogously to the instructions of Example 1:

The compounds listed in Tables 2 and 4 are prepared analogously to the instructions of Example 2:

                                      TABLE 1                                      __________________________________________________________________________      ##STR38##                                                                     Example No.                                                                           R.sup.1                                                                            R.sup.2       R.sup.3                                                                            R.sup.4                                                                            R.sup.5  Melting point                        __________________________________________________________________________                                               °C.                           3      CH.sub.3                                                                            ##STR39##    CN  CH.sub.3                                                                           CH.sub.2C.sub.6 H.sub.5                                                                 205                                  4      NH.sub.2                                                                           CO.sub.2 CH(CH.sub.3).sub.2                                                                  CN  CH.sub.3                                                                           CH.sub.2C.sub.6 H.sub.5                                                                 134-136                              5      CH.sub.3                                                                           CO.sub.2 CH.sub.3                                                                            CN  CH.sub.3                                                                           CH.sub.2C.sub.6 H.sub.5                                                                 174                                  6      CH.sub.3                                                                           CO.sub.2 (CH.sub.2).sub.2 CH.sub.3                                                           CN  CH.sub.3                                                                           CH.sub.2C.sub.6 H.sub.5                                                                 116                                  7      NH.sub.2                                                                           CO.sub.2 C.sub.2 H.sub.5                                                                     CN  CH.sub.3                                                                           CH.sub.2C.sub.6 H.sub.5                                                                 165                                  8      CH.sub.3                                                                           CO.sub.2 C.sub.2 H.sub.5                                                                     CN  CH.sub.3                                                                           CH.sub.2C.sub.6 H.sub.5                                                                 193                                  9      CH.sub.3                                                                           CO.sub.2 CH(CH.sub.3).sub.2                                                                  CN  CH.sub.3                                                                           C(CH.sub.3).sub.3                                                                       foam                                 10     NH.sub.2                                                                           CO.sub.2 CH(CH.sub.3).sub.2                                                                  CN  CH.sub.3                                                                           OC.sub.6 H.sub.5                                                                        188-189                              11     NH.sub.2                                                                           CO.sub.2 (CH.sub.2).sub.2 CH.sub.3                                                           CN  CH.sub.3                                                                           OC.sub.6 H.sub.5                                                                        221                                  12     CH.sub.3                                                                           CO.sub.2 CH(CH.sub.3).sub.2                                                                  CN  CH.sub.3                                                                           OC.sub.6 H.sub.5                                                                        foam                                 13     NH.sub.2                                                                           CO.sub.2 CH.sub.3                                                                            CN  CH.sub.3                                                                           OC.sub.6 H.sub.5                                                                        242                                  14     NH.sub.2                                                                           CO.sub.2 CH(CH.sub.3).sub.2                                                                  CN  CH.sub.3                                                                           OC.sub.6 H.sub.4 -p-Cl                                                                  143-144                              15     CH.sub.3                                                                           CO.sub.2 C.sub.2 H.sub.5                                                                     CN  CH.sub.3                                                                           OC.sub.6 H.sub.4 -p-Cl                                                                  196                                  16     CH.sub.3                                                                           CO.sub.2 CH(CH.sub.3).sub.2                                                                  CN  CH.sub.3                                                                           OC.sub.6 H.sub.4 -p-Cl                                                                  186                                  17     NH.sub.2                                                                           CO.sub.2(CH.sub.2).sub.2OCH.sub.3                                                            NO.sub.2                                                                           CH.sub.3                                                                           OC.sub.6 H.sub.5                                                                        213                                  18     NH.sub.2                                                                           CO.sub.2CH(CH.sub.3).sub.2                                                                   NO.sub.2                                                                           CH.sub.3                                                                           OC.sub.6 H.sub.5                                                                        172                                  19     CH.sub.3                                                                           CO.sub.2 CH.sub.3                                                                            NO.sub.2                                                                           CH.sub.3                                          c-C.sub.6 H.sub.11                                                                    270                                                                                                               (decomposition)                      20     CH.sub.3                                                                           CO.sub.2 CH.sub.3                                                                            CN  CH.sub.3                                          c-C.sub.6 H.sub.11                                                                    263-265                                                                 21     CH.sub.3                                                                           CO.sub.2 CH(CH.sub.3).sub.2                                                                  CN  CH.sub.3                                          c-C.sub.6 H.sub.11                                                                    191                                                                     22     CH.sub.3                                                                           CO.sub.2 C.sub.2 H.sub.5                                                                     CN  CH.sub.3                                                                           CH(CH.sub.3).sub.2                                                                      120-121                              23     CH.sub.3                                                                           CO.sub.2 CH.sub.3                                                                            CN  CH.sub.3                                                                           CH(CH.sub.3).sub.2                                                                      164-166                              24     CH.sub.3                                                                           CO.sub.2 C.sub.2 H.sub.5                                                                     CN  CH.sub.3                                          c-C.sub.6 H.sub.11                                                                    228                                                                     25     NH.sub.2                                                                           CO.sub.2 CH(CH.sub.3).sub.2                                                                  CN  CH.sub.3                                          c-C.sub.6 H.sub.11                                                                    212                                                                                                               (decomposition)                      26     NH.sub.2                                                                           CO.sub.2 CH.sub.3                                                                            CN  CH.sub.3                                                                           CH(CH.sub.3).sub.2                                                                      160-161                              27     NH.sub.2                                                                           CO.sub.2 C.sub.2 H.sub.5                                                                     CN  CH.sub.3                                          c-C.sub.6 H.sub.11                                                                    170                                                                     28     NH.sub.2                                                                           CO.sub.2 CH.sub.3                                                                            CN  CH.sub.3                                          c-C.sub.6 H.sub.11                                                                    238                                                                     29     NH.sub.2                                                                           CO.sub.2 C.sub.2 H.sub.5                                                                     CN  CH.sub.3                                                                           CH(CH.sub.3).sub.2                                                                      141-142                              30     NH.sub.2                                                                           CO.sub.2 CH(CH.sub.3).sub.2                                                                  CN  CH.sub.3                                                                           CH(CH.sub.3).sub.2                                                                      223-224                              31     CH.sub.3                                                                           CO.sub.2 CH(CH.sub.3).sub.2                                                                  CN  CH.sub.3                                                                           CH(CH.sub.3).sub.2                                                                      172-173                              32     CH.sub.3                                                                           CO.sub.2 CH.sub.3                                                                            CN  CH.sub.3                                                                           SC.sub.6 H.sub.5                                                                        207-206                              33     CH.sub.3                                                                           CO.sub.2 CH(CH.sub.3).sub.2                                                                  CN  CH.sub.3                                                                           SC.sub.6 H.sub.5                                                                        160-162                              34     CH.sub.3                                                                           CO.sub.2 CH.sub.3                                                                            CN  CH.sub.3                                                                           C(CH.sub.3).sub.3                                                                       149-150                              35     NH.sub.2                                                                           CO.sub.2 CH(CH.sub.3).sub.2                                                                  CN  CH.sub.3                                                                           C(CH.sub.3).sub.3                                                                       217-218                              36     CH.sub.3                                                                           CO.sub.2 C.sub.2 H.sub.4CN                                                                   CN  CH.sub.3                                                                           C(CH.sub.3).sub.3                                                                       184-185                              __________________________________________________________________________

                                      TABLE 2                                      __________________________________________________________________________      ##STR40##                                                                     Example No.                                                                           R.sup.1                                                                            R.sup.2     R.sup.5 Melting point °C.                        __________________________________________________________________________     37     CH.sub.3                                                                           CO.sub.2 CH(CH.sub.3).sub.2                                                                OC.sub.6 H.sub.5                                                                       196                                             38     NH.sub.2                                                                           CO.sub.2 C.sub.2 H.sub.5                                            c-C.sub.6 H.sub.11                                                                    192                                                                     39     CH.sub.3                                                                           CO.sub.2 CH.sub.3                                                   c-C.sub.6 H.sub.11                                                                    from 262                                                                                               (decomposition)                                 40     CH.sub.3                                                                           CO.sub.2 CH(CH.sub.3).sub.2                                         c-C.sub.6 H.sub.11                                                                    from 150                                                                41     NH.sub.2                                                                           CO.sub.2 CH(CH.sub.3).sub.2                                         c-C.sub.6 H.sub.11                                                                    from 192                                                                42     CH.sub.3                                                                           CO.sub.2 CH.sub.3                                                                          SC.sub.6 H.sub.5                                                                       278-279                                         43     CH.sub.3                                                                           CO.sub.2 CH.sub.3                                                                          CH(CH.sub.3).sub.2                                                                     158-160                                         44     NH.sub.2                                                                           CO.sub.2 CH.sub.3                                                                          CH(CH.sub.3).sub.2                                                                     170-171                                         45     CH.sub.3                                                                           CO.sub.2 C.sub.2 H.sub.5                                                                   CH.sub.2C.sub.6 H.sub.5                                                                240                                             46     CH.sub.3                                                                           COCH.sub.3  CH.sub.2C.sub.6 H.sub.5                                                                271                                             47     CH.sub.3                                                                           COO(CH.sub.2).sub.2OCH.sub.3                                                               C(CH.sub.3).sub.2                                                                      195-196                                         __________________________________________________________________________

                                      TABLE 3                                      __________________________________________________________________________      ##STR41##                                                                     Example No.                                                                           R.sup.1                                                                             R.sup.2                R.sup.3                                                                            R.sup.4                                                                            R.sup.5    Melting point                                                                  °C.               __________________________________________________________________________     48     NH.sub.2                                                                            COOCH(CH.sub.3).sub.2  CN  CH.sub.3                                                                            ##STR42## 144                      49     CH.sub.3                                                                            COOCH.sub.3            CN  CH.sub.3                                                                            ##STR43## 128-29*                  50     CH.sub.3                                                                             ##STR44##             CN  CH.sub.3                                                                           C(CH.sub.3).sub.3                                                                         188-89                   51     CH.sub.3                                                                             ##STR45##             CN  CH.sub.3                                                                            ##STR46## 170-71                   52     C.sub.2 H.sub.5                                                                     COOCH(CH.sub.3).sub.2  CN  CH.sub.3                                                                            ##STR47## 215-16                   53     NH.sub.2                                                                             ##STR48##             CN  CH.sub.3                                                                            ##STR49## (-)-enantiomer           54     CF.sub.3                                                                            COOCH(CH.sub.3).sub.2  CN  CH.sub.3                                                                            ##STR50## 218                      55     CH.sub.3                                                                            COO(CH.sub.2).sub.2OCH.sub.3                                                                          CN  CH.sub.3                                                                            ##STR51## 219                      56     CH.sub.3                                                                            COOCH(CH.sub.3).sub.2  CN  CH.sub.3                                                                            ##STR52## 182                      57     NH.sub.2                                                                            COO(CH.sub.2).sub.2CH.sub.3                                                                           CN  CH.sub.3                                                                            ##STR53## 191                      58     CF.sub.3                                                                            COOC.sub.2 H.sub.5     CN  CH.sub.3                                                                            ##STR54## 230                      59     NH.sub.2                                                                            COOCH.sub.3            CN  CH.sub.3                                                                           C(CH.sub.3).sub.3                                                                         174                      60     NH.sub.2                                                                            COOCH.sub.2CH.sub.2OCH.sub.3                                                                          CN  CH.sub.3                                                                            ##STR55## 217                      61     NH.sub.2                                                                            COOCH.sub.2CH.sub.2CH.sub.3                                                                           CN  CH.sub.3                                                                            ##STR56## 185                      62     NH.sub.2                                                                            COOCH(CH.sub.3)COOCH.sub.3                                                                            CN  CH.sub.3                                                                            ##STR57## 191                      63     CH.sub.3                                                                            COO(CH.sub.2).sub.2CH.sub.3                                                                           CN  CH.sub.3                                                                            ##STR58## 209                      64     CH.sub.3                                                                             ##STR59##             CN  CH.sub.3                                                                            ##STR60## 184                      65     CH.sub.3                                                                             ##STR61##             CN  CH.sub.3                                                                           C(CH.sub.3).sub.3                                                                         172                      66     C.sub.2 H.sub.5                                                                     COOC.sub.2 H.sub.5     CN  CH.sub.3                                                                            ##STR62## 220                      67     CH.sub.3                                                                             ##STR63##             CN  CH.sub.3                                                                            ##STR64## 228                      68     NH.sub.2                                                                             ##STR65##             CN  CH.sub.3                                                                            ##STR66## (-)-enantiomer           69     NH.sub.2                                                                            COOCH.sub.2CH.sub.2OCH.sub.3                                                                          CN  CH.sub.3                                                                            ##STR67## 174                      70     CH.sub.3                                                                            COOC.sub.2 H.sub.5     CN  CH.sub.3                                                                            ##STR68## 208                      71     NH.sub.2                                                                            COOCH.sub.2CH.sub.2OCH.sub.3                                                                          CN  CH.sub.3                                                                            ##STR69## (-)-enantiomer           72     CH.sub.3                                                                            COOCH.sub.2CH.sub.2CN  CN  CH.sub.3                                                                            ##STR70## 226                      73     CH.sub.3                                                                             ##STR71##             CN  CH.sub.3                                                                            ##STR72## 154                      74     CH.sub.3                                                                             ##STR73##             CN  CH.sub.3                                                                            ##STR74## 264-68                   75     CH.sub.3                                                                            COOCH.sub.2CH.sub.2CN  CN  CH.sub.3                                                                            ##STR75## 186                      76     CH.sub.3                                                                            COOCH.sub.2CH.sub.2OCOCH.sub.3                                                                        CN  CH.sub.3                                                                            ##STR76## 225                      77     CH.sub.3                                                                             ##STR77##             CN  CH.sub.3                                                                            ##STR78## 218                      78     CH.sub.3                                                                             ##STR79##             CN  CH.sub.3                                                                            ##STR80## 227-28                   79     CH.sub.3                                                                            COO(CH.sub.2).sub.3CH.sub.3                                                                           CN  CH.sub.3                                                                            ##STR81## 240-42                   80     CH.sub.3                                                                             ##STR82##             CN  CH.sub.3                                                                            ##STR83## 197-98                   81     CH.sub.3                                                                            CONHCH.sub.3           CN  CH.sub.3                                                                            ##STR84## 173-74                   82     CH.sub.3                                                                            CONHCH.sub.3           CN  CH.sub.3                                                                            ##STR85## 209                      83     CH.sub.3                                                                            CONH(CH.sub.2).sub.2CH.sub.3                                                                          CN  CH.sub.3                                                                            ##STR86## 163                      84     CH.sub.3                                                                            CONHCH.sub.2CH.sub.3   CN  CH.sub.3                                                                            ##STR87## 147                      85     CH.sub.3                                                                            CONH(CH.sub.2).sub.2CH.sub.3                                                                          CN  CH.sub.3                                                                            ##STR88## 158-60                   86     CH.sub.3                                                                            COOCH.sub.3            NO.sub.2                                                                           CH.sub.3                                                                            ##STR89## 251-52                   87     CH.sub.3                                                                             ##STR90##             NO.sub.2                                                                           CH.sub.3                                                                            ##STR91## 263-64                   88     CH.sub.3                                                                             ##STR92##             CN  CH.sub.3                                                                            ##STR93## (-)enantiomer            __________________________________________________________________________                                                           192-93              

                                      TABLE 4                                      __________________________________________________________________________      ##STR94##                                                                     Example No.                                                                           R.sup.1                                                                            R.sup.2       R.sup.5 Melting Point °C.                      __________________________________________________________________________     89     CH.sub.3                                                                           COOCH.sub.3                                                                                   ##STR95##                                                                             215-16                                        90     NH.sub.2                                                                           COOCH(CH.sub.3).sub.2                                                                         ##STR96##                                                                             258                                           91     CH.sub.3                                                                           COOCH(CH.sub.3).sub.2                                                                         ##STR97##                                                                             252                                           92     NH.sub.2                                                                           COOCH(CH.sub.3).sub.2                                                                         ##STR98##                                                                             228                                           93     NH.sub.2                                                                           COOC.sub.2 H.sub.5                                                                            ##STR99##                                                                             166                                           94     CH.sub.3                                                                            ##STR100##                                                                                   ##STR101##                                                                            158-60                                        95     CH.sub.3                                                                           CONHCH.sub.3                                                                                  ##STR102##                                                                            208-10                                        96     CH.sub.3                                                                           CONHCVH.sub.3                                                                                 ##STR103##                                                                            263                                           97     CH.sub.3                                                                            ##STR104##                                                                                   ##STR105##                                                                            190                                           98     CH.sub.3                                                                            ##STR106##                                                                                   ##STR107##                                                                            218                                           99     CH.sub.3                                                                            ##STR108##                                                                                   ##STR109##                                                                            235                                           __________________________________________________________________________

                  TABLE 5                                                          ______________________________________                                          ##STR110##                                                                    Example                             Melting                                    No.    R.sup.1 R.sup.2              Point °C.                           ______________________________________                                         100    CH.sub.3                                                                               CO.sub.2(CH.sub.2)OCOCH.sub.3                                                                       138-40                                     101    CH.sub.3                                                                               CO.sub.2(CH.sub.2).sub.2OCH.sub.3                                                                   160                                        102    CH.sub.3                                                                                ##STR111##          105                                        103    CH.sub.3                                                                                ##STR112##          191                                        104    CH.sub.3                                                                               CONHC.sub.2 H.sub.5  167-169                                    105    NH.sub.2                                                                               CO.sub.2 CH.sub.3    156                                        ______________________________________                                    

                  TABLE 6                                                          ______________________________________                                          ##STR113##                                                                    Example                          Melting                                       No.      R.sup.1   R.sup.2       Point °C.                              ______________________________________                                         106      CH.sub.3                                                                                  ##STR114##   215-217                                       107      CH.sub.3  CO.sub.2CH(CH.sub.3).sub.2                                                                   203-204                                       108      CH.sub.3  CO.sub.2C.sub.2 H.sub.5                                                                      148-150                                       109      NH.sub.2  CO.sub.2CH(CH.sub.3).sub.2                                                                   221-223                                       110      NH.sub.2  CO.sub.2C.sub.2 H.sub.5                                                                      148-149                                       ______________________________________                                    

                                      TABLE 7                                      __________________________________________________________________________      ##STR115##                                                                    Example                            Melting                                     No.  R.sup.2               R.sup.3                                                                            R.sup.4                                                                            Point °C.                            __________________________________________________________________________     111                                                                                  ##STR116##           NO.sub.2                                                                           CH.sub.3                                                                           184                                         112                                                                                  ##STR117##           CN  H   198-200                                     113                                                                                  ##STR118##           CN  CH.sub.3                                                                           185-186                                     114  CO.sub.2 CH(CH.sub.3).sub.2                                                                          CN  CH.sub.3                                                                           148-150                                     115  CO.sub.2 C.sub.2 H.sub.5                                                                             CN  CH.sub.3                                                                           160-161                                     116  CO.sub.2 CH.sub.3     CN  CH.sub.3                                                                           158-160                                     117                                                                                  ##STR119##           CN  CH.sub.3                                                                           250-254 R-Enantiomer [a].sub.589.sup.20                                         = 370.79 (C = 0.635 Dimethylformamide)     __________________________________________________________________________ 

We claim:
 1. A quinoline of the formula ##STR120## in which R⁵ represents a cyclic, straight-chain or branched, saturated or unsaturated hydrocarbon radical having up to 10 carbon atoms, which is optionally interrupted by oxygen or sulphur, and which is optionally substituted up to twice in an identical or different manner by cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, fluorine, chlorine, bromine, acyloxy having up to 2 carbon atoms, cyano or hydroxyl or by phenyl, phenyloxy or phenylthio wherein the phenyl moiety is optionally substituted up to twice in an identical or different manner by fluorine, chlorine, bromine, hydroxyl, methyl, ethyl, methoxy, ethoxy, trifluoromethyl, trifluoromethoxy or trifluoromethylthio or by a group of the formula --NR¹¹ R¹²,wherein R¹¹ and R¹² are identical or different and denote hydrogen or a straight-chain, branched or cyclic, saturated or unsaturated hydrocarbon radical having up to 6 carbon atoms, which is optionally substituted by fluorine, chlorine, hydroxyl or phenyl, wherein the cyclic radicals are optionally substituted by fluorine or chlorine or by alkyl, alkoxy, alkylthio or alkoxycarbonyl having in each case up to 2 carbon atoms, trifluoromethyl or trifluoromethoxy, or denote phenyl which is optionally substituted by fluorine or chlorine or by alkyl, alkoxy, alkylthio or alkoxycarbonyl having in each case up to 2 carbon atoms, trifluoromethyl or trifluoromethoxy,or the hydrocarbon radical is optionally substituted by a group of the formula --CO₂ --R¹⁵, --CONR²⁷ R²⁸, --NR²⁹ R³⁰, --NR³¹ --CO₂ R³² or --NR³³ --SO₂ R³⁴ wherein R²⁷, R²⁸, R²⁹, R³⁰, R³¹, R³², R³³ and R³⁴ have the abovementioned meaning of R¹¹ and R¹² and are identical to or different from these, or R⁵ represents a group of the formula D-R³⁵,wherein D denotes the CO or --S(O)_(b) group or an oxygen atom,wherein h denotes the number 0, 1 or 2,and R³⁵ denotes phenyl which is optionally substituted up to twice in an identical or different manner by fluorine, chlorine, bromine, cyano or nitro or by straight-chain or branched alkyl, alkoxy, alkylthio, alkoxycarbonyl, halogenoalkyl, halogenoalkoxy or halogenoalkylthio having in each case up to 4 carbon atoms or amino or by C₁ -C₄ -mono- or -dialkylamino,or R³⁵ denotes hydrogen or a cyclic, straight chain or branched, saturated or unsaturated hydrocarbon radical having up to 8 carbon atoms, which is optionally interrupted by oxygen or sulphur, and which can optionally be substituted by fluorine, chlorine, phenyl, phenoxy or phenylthio, or is substituted by a group of the formula --NR³⁶ R³⁷,wherein R³⁶ and R³⁷ have the abovementioned meaning of R¹¹ and R¹² and are identical to or different from these, or a pharmaceutically acceptable salt thereof.
 2. A compound or salt thereof according to claim 1, in whichR⁵ represents a cyclic, straight-chain or branched, saturated or unsaturated hydrocarbon radical having up to 8 carbon atoms, which is optionally interrupted by oxygen or sulphur, and which is optionally substituted by cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, fluorine, chlorine, nitro, cyano, hydroxyl or phenyl, phenyloxy or phenylthio wherein the phenyl rings are optionally substituted up to twice in an identical or different manner by fluorine, chlorine, methyl, methoxy, trifluoromethyl or trifluoromethoxy or by a group of the formula --NR¹¹ R¹²,wherein R¹¹ and R¹² are identical or different and denote hydrogen or a straight-chain, branched or cyclic, saturated or unsaturated hydrocarbon radical having up to 6 carbon atoms, or denote phenyl, which is optionally substituted by fluorine, chlorine, methyl or methoxy, A denotes a direct bond or an oxygen atom, or the hydrocarbon radical is optionally substituted by a group of the formula --CO₂ --R²⁶, --CONR²⁷ R²⁸, --NR²⁹ R³⁰, --NR³¹ --CO₂ R³² or --NR³³ --SO₂ R³⁴,wherein R²⁶ denotes alkyl having 1-4 C atoms or phenyl,and R²⁷, R²⁸, R²⁹, R³⁰, R³¹, R³², R³³ and R³⁴ have the abovementioned meaning of R¹¹ and R¹² and are identical to or different from these,or R⁵ represents a group of the formula D-R³⁵,wherein D denotes the --S(O)_(h) group or an oxygen atom,wherein h denotes the number 0, 1 or 2,and R³⁵ denotes phenyl, which is optionally substituted by fluorine, chlorine, bromine, methyl, methoxy, methylthio, trifluoromethyl or amino or by C₁ -C₂ -mono- or -dialkylamino,or R³⁵ denotes hydrogen or a cyclic, straight chain or branched, saturated or unsaturated hydrocarbon radical having up to 6 carbon atoms, which is optionally interrupted by oxygen or sulphur, and which is optionally substituted by fluorine, chlorine or phenyl, or is substituted by a group of the formula --NR³⁶ R³⁷,wherein R³⁶ and R³⁷ have the abovementioned meaning of R¹¹ and R¹² and are identical to or different from these.
 3. A compound or salt thereof according to claim 1, in whichR⁵ represents a group of the formula D-R³⁵, wherein D denotes an oxygen or sulfur atom, and R³⁵ denotes phenyl, which is optionally substituted by fluorine, chlorine, methyl, methoxy, methylthio, trifluoromethyl or amino or by C₁ -C₂ -mono dialkylamino,or R³⁵ denotes hydrogen or a cyclic, straight-chain or branched, saturated or unsaturated hydrocarbon radical having up to 6 carbon atoms, which is optionally substituted by fluorine, chlorine, or phenyl.
 4. The compound according to claim 1 which has the formula ##STR121## 